D3931: revlog: introduce a isancestorrev() and use it in rebase

[lothiraldan (Boris Feld)]

lothiraldan added a comment.


  Having `isancestor` and `isancestorrev` taking the arguments in a different order seems confusing, 👎

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3931

To: martinvonz, indygreg, #hg-reviewers
Cc: lothiraldan, mercurial-devel